I am designing a 4-Layer PCB with an SMT GPS/GNSS receiver (1575.42 MHz), where it connects to an external antenna through an SMA Connector. I have already done all the calculations of CPWG using Saturn PCB Toolkit to match the 50 Ohm required impedance.
As the RF trace is on top the Conductor Height(H) is 7mil (0,178mm). This value I got from the PCB manufacturer.
My final layout can be seen in the image below:
Question: What is the influence of PTH VIA of the SMA connector on the RF trace? Does it matter on "low" Frequencies of 1575.42 MHz or like 868-928 MHz or even 2.4GHz?
I know that VIAs adds inductance/capacitance to the circuit and it is strongly recommended to avoid them on RF traces, but what about in this case?
Is there any consideration about the gap of the VIA pad and the ground plane of CPWG?
I have searched for CPWG to SMA Connector transition but everything that I found is saying about the board edge mount connector, but nothing explicit explaining about the PTH connector or saying something about VIA influence (always to avoid using VIA on RF Trace).